<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #div1 {
            color: yellow;
        }
        .div1 {
            color: green;
        }
        div {
            color: blue;
        }
        * {
            color: red !important;
        }
    </style>
</head>
<body>
    <div class="div1" id="div1" style="color: aqua;">测试优先级用</div>
</body>
</html>